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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Structurally ordered Pt-Zn/C series nanoparticles as efficient anode catalysts for formic acid electrooxidation
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Structurally ordered Pt-Zn/C series nanoparticles as efficient anode catalysts for formic acid electrooxidation

机译：结构有序的Pt-Zn / C系列纳米颗粒可作为甲酸电氧化的高效阳极催化剂

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摘要

Controlling the size, composition, and structure of bimetallic nanoparticles is of particular interest in the field of electrocatalysts for fuel cells. In the present work, structurally ordered nanoparticles with intermetallic phases of Pt3Zn and PtZn have been successfully synthesized via an impregnation reduction method, followed by post heat-treatment. The Pt3Zn and PtZn ordered intermetallic nanoparticles are well dispersed on a carbon support with ultrasmall mean particle sizes of similar to 5 nm and similar to 3 nm in diameter, respectively, which are credited to the evaporation of the zinc element at high temperature. Meanwhile, these catalysts are less susceptible to CO poisoning relative to Pt/C and exhibited enhanced catalytic activity and stability toward formic acid electrooxidation. The mass activities of the as-prepared catalysts were approximately 2 to 3 times that of commercial Pt at 0.5 V (vs. RHE). This facile synthetic strategy is scalable for mass production of catalytic materials.
机译：在燃料电池的电催化剂领域中，控制双金属纳米颗粒的尺寸，组成和结构特别重要。在目前的工作中，已经通过浸渍还原方法成功地合成了具有金属间相Pt3Zn和PtZn的结构有序的纳米粒子，然后进行了后热处理。 Pt3Zn和PtZn有序的金属间纳米粒子很好地分散在碳载体上，其平均粒径分别接近5 nm和3 nm，具有超小平均粒径，这归因于高温下锌元素的蒸发。同时，相对于Pt / C，这些催化剂不易受到CO中毒的影响，并且表现出增强的催化活性和对甲酸电氧化的稳定性。所制得的催化剂的质量活度约为商用Pt在0.5 V（vs. RHE）的质量活度的2至3倍。这种简便的合成策略可扩展用于大规模生产催化材料。

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